Carbureter.



. J. 0. HOBBS.

OAEBUBETER.

APPLICATION FILED P111311, 1907.

Patented Aug. 29; 1911.

' of engines of thist UNITED JOHN 0. Hours, or cmcaeo, ILLiltors.

GABBUBETEB.

Specification of Letters Patent. Pfite ntqi Aug 29 1911.

Application filed February 1,1907. Serial noiztaas'l.

To all whom it me concern:

Be it known t at I, Jomv O. Hones, a citizen of the United States, residing at Chicago, in the county of'cook and State of Illinois, have invented certain new and use ful Im rovements in Carbureters, of which the fol owing is a specification.

The object of my invention is to provide improved means for regulating the flow of gasoleneor other combustible used in gas engines as the speed of the engine variesi It is well-known that variations in the speed pe cause fluctuations of ressure in the car uret-ing" chamber resultlng inan irregular flow of gasolene not properly proportioned to the needs of the on me. a

he purpose of my invention is to provide means whereby variations in pressure in the carbureting chamber "will through suitable valve mechanism maintain the proper flow of gasolene.

In'the drawings- Figure 1 is a sectional elevation of a carburetor embodying my invention. Fig. 2 is a sectional elevation of the valve and' valve seat. Fig. 3 is a cross section of the valve and valve seat.

I have illustrated my invention in connection with a carbureter of a formjn common use, provided with a float feed constant level device. The resecvoir 3 communicates through the passage 1 with a reservoifl-not shown, containing gasol'e'ne or other hydro- I carbon. ,The passe e 1 is provided at its lower end" with a valve seatui meeting with the valve 5 attached, to the float 2. This part of the device operates in the usual manner to maintain thehydrocarbon at a constant level in .the outlet pipe 6 located in the carbureting chamber. The pipe 6 in the form of apparatus illustrated is. provided queer its 11 per end withtransverseapertures 8 throng which the hydrocarbon is de signed to be drawn by the partial vacuum existing in the carbureting chamber 9 during the suction stroke of thegpiston. The engine proper is not shown in the drawings as t forms no part of my invention, but the combustion chamber thereof communicates" with the carbureter'through the opening 12 in the barrel throttle 13.

The main air supply opening is re resented by the numeral and the sewn ar .1 air inletb the numeral 35. The,,l atff s norms-ll c osed by'the masseuse is held in lo' the spring 10 hearing held t e valve'normall.

position. -The casin 1 atjthe-toP ofthe earbureter consists o a spider oreriorated' Located beneath thisspi erorqper lower walls of said groove. rangement the plate 19 is exposed on the against the adjustable nut-11 on the valve stem24. Y

(lo-acting with the valve seats formed by the apertures 8 in the tube; his a two art valve-14 designed tOzH'lOYB in a vertica di rectlon over theyvalve seats. "Each of the parts -14 constitutes, a separate valve having the form of a ent partially surrounding the pipe 6. Owmg to the fact. that the resence of gasolene renders it impossib e to properly ubricate the valve and valve seat,

have constructed the valve in two sections partlally embracing the circumference of the p pe 6. By means of this construction l avold the possibility ofthe valve binding or becoming wedged, which efieet would result, if a valve in the form of a continuous ring were used. In its broader aspect, how-. ,ever, my invention is not limited to the articular form or number of valves used. he

sections f the valve 14 are mounted upon.

the forked ends 16, 16 of the. valve stem'15. The'elewenends '16 of" the :valve stem are given a'slight initial tension inward in order to hold the valves 14 to-th'eir seats with theretiuislte spring pressure. H1 ves 14 15, therefore, mounted on a spring, which in the apparatus illustrated consists of one oftlieends 100i the stem 15. The valve'- stem 15" extends through the casing oLthe carbureter.- Theupper'end" ofthe stem is screw-threadedand carries a nut 18 preferably knurled upon its periphery. A spr ng abuts at its lower end against the casing 17 of the carbureterand at its upper Each of the end a ainst. the nut '18, thus tendi-ng to 1 late. orated plate is a circular plate or piston '19 of slightl 19 is seated in an annular groove-36 in the wall of the carburetor chamber andis' free in' its uppermost greater "diameter than tli'e-iIi-, p. tenor of t e carbureterchamber." Thep'late to move vertically between the upper and upper side to atmospheric pressure andon The valve and 21 three ed on the valve stem above By this a r.

-the under side to the pressure in the carbureting chamber. u 1

. I 'stem 15 is operatively can neeted to the gilatell) by means of nutsQO 1 Q- a I I 1,001,017

tive to the valve seat may be adjusted. The nuts 20 and 21 also serve to transmit the movement of the plate 19 to the valve. The nut 18 a'fiords means for adjusting the tension of the spring '30, thereby regulating the amount 0 plate 19 and the valve 14. Any suitable means may be adopted for preventing the valve stem 15 from rotating and thus dieplacing the valve members 14, 14 from their roper positions relative to the aperture 8. n the present instance I have shown a lug 26 upon the casing 17 and a co-acting groove 27 in the' stem 15.

In operation'the position of thje valve. let

'will be so adjusted relative to the apertiire 8 in the outlet tube 6 that the. proper amount of hydrocarbon will flowt hrough the aperture 8 durin the operation of theengine at v normal spee Whenever owing to a light load or other cause the engine speeds up beyond the desired limit thein'creased suction due to the rapid movement of the engine piston will decrease t-he pressure in the carureting chamber 9 below the limit reached during the operation of the engine at normal speed. As the pressure on the upper side of the plate 19 is constant, 5.0., atmospheric pressure, the decrease ofpressure on its 39 lower side will .result in a depress on of the diaphragm. The downward movement of the. diaphragm being transmitted to the valves 14 will resul t in moving the valves to ari ext ent determined by the difference in pressure upon the opposite sides of the diaphragm. By proper adjustment of the nuts 20 and 21 the valve ltmay be positioned with its lower edge normally adjacent the top of the aperture 8, in which case the downward movement of the plate 19 will decrease the size of the gasglene outlet, open ing, or the valve may be normally adjusted with its upper edge atapoint intermediate the topand bottom of the aperture 8, in which misc the downward movement of the plate 19 will increase the size of the. gasoene'out'l'et by uncovering tl e. aperti1reI-8. Either of the adjustments referred to may be used;depend'im on whcther it is desired to increase or decrease the size of the gasothe engine. a

While the springs 10 and30 are shownas havinga wide range of adjustment, I find itdesirable to have the valve -over the secondary'air inlet open for a less. degree of vacuum than that necessary to shift the piston -19 and the valves 14'. ,v It will be readily understood that in place of the-movable plate 19 I may provide a flexible diaphragm fixed at the edges and attached to the valve stem, at the center..

From the foregoing it will clearly appear that I have p'rovide'dsimple and eifective means for governing the flow of gasolene or lene outlet upon an increase in the speed of force necessary to move the against thev surface of said inlet pipe, and aw.

other liquid fuel in such manner as to properlregulate the s eed of the engine.

hi e I have escribed one s cific embodiment of my invention, it wil be understood that the principle involveld may be applied in mechanisms of widely divergent forms, and that myinvention is not restricted to the specific device illustrated and' described herein.

'1. In a carbureter, an adjustable valve for regulating the size of the hydrocarbon outlet, means for adjusting said valve, said valve in oneadjustment operating to increase the size of the hydrocarbon outlet 9 upon an increase in the speedof the engine, I and in another adjustment operating to del crease the size of the hydrocarbon outlet upon an increase in the speed of theengine.

2. In a carbureter. a gasolene inlet pipe 35 with two opposite lateral openings, a slide valve member for each opening, and a spring fork carrying said members and pressing them together over the respective lateral openings.

3. In' a carbureter, primary and secondaryair inlets, an inwardly openin valve for said secondary inlet, a spring no; ..ally holding said valve closed, means for adjusting the tension of said spring, a gasolene inlet,

a valve therefor, a movable member conneeted to said valve, said. movable member exposed on one side to atmospheric pressure and on the other side to the pressure Within the carburetor. a spring impelling said movable member against atmospheric pressure, and means for adjusting the tension ot. said spring, the. connection between the gasolenc valve and said movable member being such that said valve is given a closing movement when the degree of vacuum in the carburetor.increases and an opening move- 'ment. when the degree of vacuum decreases.

4. In afcarbureter, a gasolene inlet pipe ,0 provided withan opening, a valve, and a 1 spring carrying said valve and forcing the I same against thesurface of said inlet, pipe,

5. In aearbureter, a gasolene inlet pipe provided with lateralopenings, a slide valve, i and. a spring fork'carryingsaid slide ,v'alverf and pressing it over said lateral-openings,

. I 6. In a carbureter, a gasolene inlet pipe. provided with an opening, a-'slidevalve,

spring' carrying said valve and pressing movable member connected to said sprin-g,' said movable member being exposed on one 7 side to atmospheric pressure and on the op posite sideto the. pressure ivithin'the earbureter. 7. In a earhureter, a gasolene inlet: piplejf; provided with lateral openings, a slide valve, a spring'fork carryin said slide valve and pressing it over.sa1'd ateral openings, and a movable member connected to said"v spring fork, saidmovable member being I side to the pressure within the carlmreter,

exposed on one side to atmospheric pressure and on the opposite side to the pressure.

fjustmg the tension otsaid s 'iring.

ii. in a earburt-ter, a lrvdroearlain inlet S. In a carburetor, a gasolene inlet pipe provided with a lateral opening, a slide valve, or spring pressing the valve against the surface of said pipe, 1: connected to said spring, the normal position of said valve being determined by the connection between said spring and movable IL movable member member, said movablemember being ex-v posed on one side to atmospheric pressure and on t'l) within the carluirerer, and a spring opera opposite side to the pressure:

tively connected to said movable men'lber to 5 resist atmosplnirie pressure.

9. In a earlnn-ett-r, a gasolene inlet. pipe provided with a lateral opening, a slide valve, a spring fork carrying said slide valve and pressing it over said lateral opening, a movable member connected to said springfork, said movable member being exposed on one side to atmospheric pressure and on the o iposile side to the pressure Within the car ureter, and a spring bearin upon the side of said movable member which is exposed to atmospheric pressure.

10. In a earbureter, primary and secondary air inlets, an inwardly opening valve for said secondary inlet, a spring normall holding said valve closed, means for a justing the tension of said spring, a gasolene inlet, a valve therefor, a movable member adjustably connected to said valve, sai'd movable member being exposed on one side to atmospheric pressure and on the other a spring supporting said member against atmospheric: pressure, and nieans for adpipe with lateral penings, a :-lltll.. valve member for each of said lateral openings. and aspring carrying said members and pressing them together against said lateral openings.

12. ln'a earbureter, a hydroearlwn inlet pipe provided with a lateral opening. a' valve cooperating with said opening, a spring engagingsaid valveand also engaging theopposite side of said pipe, the tension of said spring aeting to press said valve against the lateral face of said pipe.

13. In a rarbureter, a gasolene inlet pipiprovided with lateral openings, valves there for, a movable member adjuslably eonnet-ted to said valves, said movable member being eiipo'sed on one side to atmospheric pressure and on the other side to the pressure within the carburetor, a' spring supporting said movable membe against. atmospheric pressure and means for adjusting the tension of said spring, the ad ustable connection of.

said valves and said movable member being such that the size of said lateral. openings can be made either to increase or diminish upon decrease.of atmospheric pressure within the arburetcr.

JOHN 0. HOBBS.

Witnesses:

WALTER A. Soon, J ERNIE A. MAcEmvaRo. 

